<mat-card>
  <mat-card-title>Toast</mat-card-title>
  <mat-card-content>
    <button mat-raised-button color="primary" (click)="showSimpleToast()">
      默认示例
    </button>
    <button mat-raised-button color="primary" (click)="showActionToast()">
      带动作示例
    </button>
  </mat-card-content>
</mat-card>
